Did domestication by selective breeding occur intentionally?

” Chickens haven't been selectively bred not to fly, they've been selectively bred to have lots more muscle (meat) which makes them heavier and impairs the flying ability. read more

Selective breeding is essentially a process of increasing the frequency of rare, recessive alleles to the point where they usually appear in homozygous form. Once the wild-type alleles are eliminated from the population, the process of domestication has become irreversible and the domestic species has become dependent on humans for its survival. read more